confused about texture types
The images store multiple material information in their color channels. When you view them in RGB, the resulting image doesn't make any sense, because all these layers just get added up.
If you look at the color channels independently, you can identify the stored information. The RGB channels of boYTW.png and K3Cvf.png look like this:



I don't exactly know, what the R channel is for in the first image, it might be some kind of mask or SSS information. The green channel however clearly stores the specular information. You can see the shiny hair, the wet lips and the metal buttons. The blue channel seems to store the roughness information.

The other image only carries two channels, R and G. Blue is black and therefor doesn't store any information.

The Red channel seems to store emission information, the Green channel stores ambient occlusion data.

You can grab the channels in Blender and see for yourself, wich channel might contribute to wich part of the shader.
Here is one possible experiment, there are obviously a lot of maps missing, you'd need to add the albedo and normal maps. But this is a nice approach to see wich texturechannel might deliver wich information.



I hope that helps!